Guild Wars 2 is an online RPG developed by ArenaNet, and continues the subscriptionless business model of the original Guild Wars. The game is set about 250 years after the events of its predecessor in a world devastated by the ancient elder dragons resurfacing after millennia of slumber.

Can Macs even run this game on reasonable settings? Most people have the mid/low-end Macs (because a low-end Mac still costs $1000 :P) which have integrated Intel graphics.

Can't speak for the machines with only integrated graphics, but it looks like it's definitely playable on an ~18 month old MBP. Wouldn't be my first option at the moment, but it saves a reboot into Windows.

@mcderby4: Because the Mac beta takes place in the release version of the game, you would have to actually purchase the full game, yes. Because they've said that both the Mac and Windows clients are usable by everyone who has access, I'm assuming a digital download will work as well as a boxed copy for your purposes.